Add Last.fm music stats to about page

src/routes/api/lastfm/covers/[id]/+server.ts

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+import { error } from '@sveltejs/kit';
+import { readFile } from 'node:fs/promises';
+import path from 'node:path';
+import { loadCovers, savedCoverPath } from '#lib/server/lastfm/covers';
+import type { RequestHandler } from './$types';
+
+const contentTypes: Record<string, string> = {
+	'.jpg': 'image/jpeg',
+	'.jpeg': 'image/jpeg',
+	'.png': 'image/png',
+	'.webp': 'image/webp',
+	'.gif': 'image/gif'
+};
+
+export const GET: RequestHandler = async ({ params }) => {
+	await loadCovers();
+	const filePath = savedCoverPath(params.id);
+	if (!filePath) error(404, 'Cover not found');
+
+	return new Response(await readFile(filePath), {
+		headers: {
+			'Content-Type': contentTypes[path.extname(filePath)] ?? 'image/jpeg',
+			'Cache-Control': 'public, max-age=31536000, immutable'
+		}
+	});
+};